package cn.tedu.wyy.jdbc;

import java.sql.*;
import java.util.Scanner;

public class Login {
    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入账号：");
        String username = scanner.nextLine();
        System.out.println("请输入密码：");
        String password = scanner.nextLine();
        loginPlus(username, password);
    }

    public static void login(String n, String p) throws Exception {
        System.out.println("输入的账号是：" + n);
        System.out.println("输入的密码是：" + p);
        String sql = "SELECT id FROM `user` WHERE username ='" + n +
                "' AND `password` = MD5(" + p +
                ");";
        Class.forName("com.mysql.jdbc.Driver");
        String url = "jdbc:mysql://localhost:3306/test?useSSL=false";
        String username = "root";
        String password = "root";
        Connection connection = DriverManager.getConnection(url, username, password);
        Statement statement = connection.createStatement();
        ResultSet set = statement.executeQuery(sql);
        if (set.next()) {
            System.out.println("登录成功！");
        } else {
            System.out.println("登录失败！");
        }


    }

    public static void loginPlus(String n, String p) throws Exception {
        System.out.println("输入的账号是：" + n);
        System.out.println("输入的密码是：" + p);
        String sql = "SELECT id FROM `user` WHERE username = ? AND `password` = MD5(?);";
        Class.forName("com.mysql.jdbc.Driver");
        String url = "jdbc:mysql://localhost:3306/test?useSSL=false";
        String username = "root";
        String password = "root";
        Connection connection = DriverManager.getConnection(url, username, password);

        PreparedStatement ps = connection.prepareStatement(sql);
        ps.setString(1, n);
        ps.setString(2, p);
        ResultSet set = ps.executeQuery();
        if (set.next()) {
            System.out.println("登录成功！");
        } else {
            System.out.println("登录失败！");
        }


    }
}